Transitioning from Switch Statements To Switch Expressions in C#, ok

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Transitioning from Switch Statements To Switch Expressions in C#

Shivam Payasi · Answer

Next, let’s get into the C# 8 version. This version is a lot shorter. Some not used to using the Lambda expressions might argue that this code is not readable. I think the contrary. You just need to get used to Lambda expressions that are already used everywhere. The code is a lot shorter, and the essentials are lot easier to grasp. The switch statement is reversed with the switch expression. The variable to switch on is first – followed by the switch keyword. You don’t need to write case and break anymore. Every match on the left side with a pattern is followed with a lambda operator to separate the right side with the result. The sample code makes a match for the Book type – and uses the property pattern to match for specific property values: public class BookTemplateSelector : DataTemplateSelector { public DataTemplate? DefaultBookTemplate { get; set; } public DataTemplate? WroxBookTemplate { get; set; } public DataTemplate? AWLBookTemplate { get; set; } public override DataTemplate? SelectTemplate(object item, DependencyObject container) => item switch { Book { Publisher: "Wrox Press" } => WroxBookTemplate, Book { Publisher: "AWL" } => AWLBookTemplate, Book _ => DefaultBookTemplate, _ => null }; }

Transitioning from Switch Statements To Switch Expressions in C#, ok

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